If a single person is the sole bearer of incredibly critical information it's a failure of the organization to insure itself against risk and possibly a failure

If a single person is the sole bearer of incredibly critical information it's a failure of the organization to insure itself against risk and possibly a failure of the individual to properly express the amount of specialized knowledge. I think tech companies are pretty good about this though, since the whole meme around "bus factor" is well understood and broadly discussed.